80771705540 has 24 divisors (see below), whose sum is σ = 169662561432. Its totient is φ = 32300686080.

The previous prime is 80771705537. The next prime is 80771705563. The reversal of 80771705540 is 4550717708.

It can be written as a sum of positive squares in 4 ways, for example, as 329132164 + 80442573376 = 18142^2 + 283624^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80771705491 and 80771705500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416591 + ... + 578870.

It is an arithmetic number, because the mean of its divisors is an integer number (7069273393).

Almost surely, 2^80771705540 is an apocalyptic number.

It is an amenable number.

80771705540 is an abundant number, since it is smaller than the sum of its proper divisors (88890855892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80771705540 is a wasteful number, since it uses less digits than its factorization.

80771705540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999527 (or 999525 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 44.

The spelling of 80771705540 in words is "eighty billion, seven hundred seventy-one million, seven hundred five thousand, five hundred forty".